Cruise control won't work

As several others on the forum describes i experince the same problem that the cruise control sometimes won't work. Other times it works for some minutes and then suddenly it disconnects?
I had the car to several workshops but always new explanations but still no fix.

how to replace the combination switch? my cruise control quit and I commute 160 miles every day - I rely on it - how to replace the combination switch? my cruise control quit and I commute 160 miles every day - I rely on it -

3 Answers

Anonymous

Re: cruise control won't work

This relates to manual transmission: There is a small comment in the manual that says cruise control will not engage if the computer believes this will result in under or over reving the engine. My intermittent behaviour seems to be due to this. As long as the revs are between 2k and 3k then cruise engages. Can then change gear to get the fuel efficiency. - A6 2008 2.7l Diesel. Hope this helps.

99% of the time it's the combination switch (the column switch assembly that houses the turn signal stalk and the headlight stalk). They're not designed extremely well and are a known failure area on the A4, which I believe shares the stalk with the A6. If it's the stalk, it's about an hour long job yourself to change it out, and the part is about $158 new. You do have to deal with the airbag though (the steering wheel has to come off), so if you're squeamish about this, it may be better to have it done by a shop.

Great - glad it worked. There is a cruise control module inside the dash, above the glovebox, on some Audis, but there's no way to know if yours has that or has it incorporated into the car's computer. Still, the stalk is the usual reason that the cruise fails. Glad you are back on the road with it working again:)

Great - glad it worked. There is a cruise control module inside the dash, above the glovebox, on some Audis, but there's no way to know if yours has that or has it incorporated into the car's computer. Still, the stalk is the usual reason that the cruise fails. Glad you are back on the road with it working again:)

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not being informed if it is auto or manual, here are some of the items that control the cruise control
brake pedal sensor ,
clutch pedal sensor,
vehicle speed sensor
engine ignition control module , tacho ,
vehicle speed --will disconnect if the road speed is below setting minimum speed
ratio changing
bad cruise control switch
wiring and connections
ecm problems
problem cruise control module

Get down and look at parking brake assembly, If you see an electrical connector, unplug it, see if that helps? If it doesn't help or causes other issues just plug it back in.
Of course that isn't the proper fix. If something wrong with parking brake assembly, get it checked out.

on my 98 eldo the cruise control clips to a bracket if it has come undone the cruise might say it has engaged it cant engage. If the plastic piece on the cruise cable has broke use several zip ties to hold cable in place' Make sure it holds it in place proberly or idle will be to high. look under hood driver side there will be 2 cables. 1 eccelarator. 1 cruise controll

The ECT (Electronic Throttle control) disables the cruise control when it encounter a malfuction. And illuyminates the wrench sign.And it may illuminate the mil light.These will be accompainied by codes.You will need the code

Debbie, this sounds to me to be the control arm that turns your wipers on and also has the cruise control operation also on the lever, When this wears out you can have weird symptoms, sometimes the wipers will work and the cruise wont and sometimes the other way around. On the starting issue, it sounds like the ignition switch on the column is worn out sometimes making contact and sometimes not. If the vehicle has a ton of miles on it these plastic parts wear out and need replacing.